Is there a database somewhere of common lists?
So here’s a couple quick resources that i could think of.  First of all, you could look at this,

https://en.m.wikipedia.org/wiki/List_of_lists_of_lists

It has classics such accidents,  hospitals in Asia, or even a list of famous resignations. It’s easentially a list of random lists of things.  It may not owner cover your requirement for sequences but it’ll help with small subsets of lists. 

As for sequences, you could always check out,

https://oeis.org

It’s pretty much a list of official mathematical sequences.  It’s got everything from the Fibonacci sequence to esoteric sequences you’ve never heard of.